Age calculator
Calculate exact age in years, months and days.
Age calculator
Fill in the fields and the result will appear here automatically.
Use this age calculator to find exact age on today or another target date.
How it works
Formula and logic
The calculator compares calendar dates and accounts for month lengths and leap years.
Example
Enter a birth date to calculate age on a specific future date.
Fields and units
- Date of birth — date
- Target date — date
How to use
- — Enter date of birth.
- — Choose target date if needed.
- — Review exact age and total days.
Enter date of birth. Choose target date if needed. Review exact age and total days.
Sources and review status
- Calculation method
- The calculator compares calendar dates and accounts for month lengths and leap years.
- Data or methodology source
- The formula and input definitions documented on this page.
- Last reviewed
- Limitation
- For documents and deadlines, verify inclusion rules, holidays and the requirements of the relevant organization.
FAQ
How accurate is this age calculator?
The result is a practical estimate based on the values you enter and the formula shown on the page.
Does this age calculator require an account?
No. The calculator works in your browser and does not require registration.
Can I share a age calculator result?
Yes. Use the share link to copy the current inputs in the page URL.